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J. FERRAND. REGULATOR FOR DYNAMO ELEGTRIG MACHINES.

No. 529,117. Patented Nov. 13, 1894.

FIG- 3 FIG I FIG- 2 WI TA/ESSES.

Nuams PETER; co. PHoToLrmu, WASHINGTON. u. c.

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J; PERRAND. REGULATOR FOR DYNAMO ELEGTBIG MACHINES. No. 529,117. Patented Nov. 13 1894.

' frw gm or 5 WM UNITED STATES PATENT DEEICE.

JULES FERRAND, OF

DARNETAL, FRANCE.

REGULATOR FOR DYNAlVlO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 529,117, dated November 13, 1894.

Applicationfiledil'uly 3,1891. Serial No.398,336. tNomodel.)

Patented in France December 29, 1890,1110. 210,436 in Belgium 111119 39L110. 95.420; in England J'une 25,1-891,No.10,843; in Italy June 25, 1891, No. 29,979 499: in Switz June 25, 1891, No. 3,699. and in Germany June 26,1891.N0.62.433.

To all whom it may concern:

Be itknown that I, J ULES FERRAND, of Darnetal, (Seine-Infrieure,) in the Republic of France, have invented a new or Improved Regulator with Oarbons for Dynamo-Electrical Machines and for Electrical Currents, (for which I have obtained Letters Patent of France for fifteen years, No. 210,436, dated December 29, 1890; Letters Patent of Belgium, No. 95,420, dated June 25,1891; Letters Patent of Great Britain, No. 10,843, dated June 25, 1891; Letters Patent of Itaiy, No. 29,979/499, dated June 25, 1891; Letters Patent of Switzerland, No. 3,699, dated June 25,1891, and Letters Patent of Germany, No. 62,433, dated June 26, 1891;) and I do hereby declare that the following is a full and exact description thereof, reference being made to the accompanying drawings.

My invention has for its object the automatic regulation of electrical generators for multiple arc distribution, to automatically compensate for variations in the number of translating devices, such as lamps, in circuit, variations in the speed of the generator, &c.

The invention consists mainly in combining with a shunt dynamo a regulator of the character hereinafter described, and having one or more carbon columns through which the exciting current passes, and the resistance of which is controlled in the manner to be described.

The invention consists further in the regulator to be described, independently of its connection with a dynamo or other special apparatus.

When the regulator is employed for the regulation of a dynamo'electric machine for the production of electric light and distribution in multiple arc, and with a single winding in the field magnet coils, the regulating lever is extremely sensitive to the variations of intensity in the main current and the regulation is offected instantaneously, notwithstanding the variations in the speed of the motor and independently of the greater or smaller number of lamps operated.

Referring to the accompanying drawings, in which like letters indicate similar parts,

the carbon column.

Figure 1 is a side elevation of my improved regulating device in connection with a carbon column. Fig. 2 is a plan view of the same. Fig. 3 is a side view, partly in section on line 1-2 of Fig. 1; and Fig. 4 is a side elevation showing various circuits and their connection with the regulating apparatus.

In said drawings K represents a base-plate to which is secured a standard I and oil or dash-pot cylinder F. In the upper part of the standard I is secured a regulating electro-magnet D, and on one side of this standard is pivoted a regulating lever composed of three integral or connected arms E, E E the upward extending arm E serving as an armature for the electro-magnet D and the outwardly extending arm E having pivoted thereto at its outer end a rod connecting with a piston L in the oil cylinder F. This arm E also supports a counterbalance p. The piston L is perforated with a hole, the crosssections of which are increased or diminished by means of a screw 0.

Upon the base K are secured in any desired manner, supports or arms provided with insulated bearings for a casing or frame carrying a column of carbon plates A. One end of this carbon column is adapted to bear or rest against a regulating screw B turning in a threaded nut or opening on the support for The other end of the carbon column bears or rests against a rod 0' the outer end of which is threaded as shown at H, the threaded portion passing through a threaded opening in the lower end of the lever arm E and adjustable therein by means of ordinary thumb screws as shown.

The current which it is desired to maintain continually in the main line is first predetermined and the screw B is adjusted to the proper point to produce the required field magnetstrength.

When a dynamo-electric machine is employed, as shown in Fig. 4, the exciting current passes from the dynamo to and through the carbon column and lever arm back to the dynamo as shown at N N in said figure.

From the main circuit there is a shunt circuit M M leading to and through the electro-Inagnet D thus energizing it, as shown in Fig. 4.

When the current passing through the carbon column is maintaining the current required in the main line, the electro-magnet D will have a magnetic force dependent on the strength of the derived current and the construction of its coil. Under these circumstances, the magnetic force of the electromagnet D will maintain the armature lever E in a position of equilibrium corresponding to the predetermined pressure on the carbon column in the exciting circuit.

Assuming that a machine is regulated at one hundred volts and ten am peres for feeding twenty lampsin multiple, as long as the number of lamps remains constant the regulator has simply to compensate for irregularities in the speed of the generator, but suppose twenty more lamps be thrown into use: the line current will fall for an instant several volts when there is no automatic regulator, but with my regulator as soon as the potential begins to fall magnet D loses a little of its power, and weight P, overcoming the pull of the magnet, presses the carbons more closely together, thus reducing their resistance and allowing a stronger current to pass through the field magnet coils. This raises the main line current to one hundred volts and twenty amperes. If, on the other hand, some of the lamps are thrown out of circuit, the operation described will be reversed.

I do not limit myself to the precise form of generator shown, as the regulator can be applied to other machines for use in multiple arc distribution.

What I claim as my invention is 1. In a current regulator constructed to operate in connection with an electric generator, the combination with the wire carrying the field magnet exciting current, and carbon column A interposed in said wire and through which the exciting current passes, of means for automatically regulating the pressure upon the carbon column, consisting of a shunt circuit, electro-magnet D therein and adapted to be energized by a derived current, armature arm E, pressure arm E made integral with said arm E, adjusting rod II 1' at one end of said arm E adapted to bear against one end of the carbon column, and weighted lever arm E made integral with arms E E all substantially as described and for the purposes set forth.

2. The combination in a regulator of a standard I, magnet D supported thereby, a three armed pivoted lever E E E arm E serving as an armature for said magnet, a weight on the arm E a pressure or contact device carried by arm E, and the carbon column A, all arranged, substantially as de' scribed.

8. The combination in a regulator of the standard I, magnet D supported thereby, a three armed pivoted lever E, W, E serving as an armature for said magnet, a movable weight on the arm E a pressure or contact device carried by arm E, the carbon column A, and the dash-pot, all arranged su bstantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

JULES FERRAND.

Witnesses:

O. MAINE, R. LE ROY. 

